Date: Sun, 18 Feb 1996 01:26:49 -0700 (MST) From: Dave Andersen <angio@aros.net> To: Arjan.deVet@adv.IAEhv.nl (Arjan de Vet) Cc: taob@io.org, hackers@FreeBSD.ORG Subject: Re: Web server locks up... but not quite. (?) Message-ID: <199602180826.BAA24207@terra.aros.net> In-Reply-To: <199602172208.XAA07502@adv.IAEhv.nl> from "Arjan de Vet" at Feb 17, 96 11:08:58 pm
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Lo and behold, Arjan de Vet once said:
> We have seen exactly these symptoms too. At one moment our main ISP
> machine (2.0.5) hung almost every night between 2:06h and 2:07h. We had
[...]
> 2:07h when /etc/daily was running we moved /etc/daily from 02:00h to
> 10:00h (when there's always somebody near the machine to reboot it) and
> the nightly hangs disappeared. They happen once in while now, around 10:07
> :-((. But the real problem has not been found yet...
If you want to track it down a bit more, put some log entries in the
/etc/daily *and* the /etc/security files that just do:
echo "Hey, we just cleaned preserver" >> /var/log/testlog
echo "Hey, security just finished the find" >> /var/log/security
(More legible entries would probably be better, but it's late).
Off the top of my head, I'd suggest that the problem revolves around the
disk I/O part of your system. The daily does some semi-heavy disk stuff
when it nukes old logfiles, and security does a find on your locally
mounted filesystems for setuid devices. I'm not sure how big your
filesystems are, but it almost sounds like the hang is happening during
that find.
Of course, I'm not sure what to tell you to do about it. :-)
-Dave Andersen
--
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